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2. Social Trends 1974;Central Statistical Office,1974
3. The effects of differing levels of spatial mobility: a discussion;Doubleday;Transactions of the Martin Centre,1976
4. The concept of spatial mobility and an analytical approach;Doubleday,1976
5. 1971 Repeat Survey of Travel in the Reading Area;Downes;TRRL Supplementary Report SR43UC,1974